The BGS Lexicon of Named Rock Units — Result Details

Laig Gorge Sandstone Member

Computer Code: LAGS Preferred Map Code: notEntered
Status Code: Full
Age range: Turonian Age (KT) — Turonian Age (KT)
Lithological Description: Medium- to coarse-grained poorly sorted sandstones and conglomerates.
Definition of Lower Boundary: The lower boundary is unconformable on the Gribun Chalk Formation but the formation is considered to be absent in Mull and Morvern by Mortimore, Wood and Gallois (2001). This member is the basal unit of the Strathaird Limestone Formation according to Braley (1990).
Definition of Upper Boundary: The upper boundary is disconformable (at an erosion surface above a coarse very poorly sorted conglomerate) with the grey micritic limestones of the remainder of the Strathaird Limestone Formation (the Laig Gorge Limestone Member) at Strathaird on Skye and at a burrowed surface with the same limestones at Laig Gorge on Eigg.
Thickness: 3.0m at Laig Gorge, Eigg.
Geographical Limits: Known on the islands of Eigg and Skye.
Parent Unit: Strathaird Limestone Formation (STRL)
Previous Name(s): Laig Siltstone Member [Obsolete Name And Code: See STRL And LAGS] (LAGSL)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Strathaird on Skye. Where 0.44m of the top of the member is seen below the Laig Gorge Limestone Member. 
Type Section  Laig Gorge on Eigg. See Emeleus, 1997, 35-36. 
Reference(s):
Braley, S M. 1990. The Sedimentology, Palaeoecology and Stratigraphy of Cretaceous Rocks in N.W. Scotland. Unpublished PhD Thesis CNAA, Polytechnic SouthWest (now University), Plymouth. 
Emeleus, C H. 1997. Geology of Rum and the adjacent islands. Memoir (sheet) of the Geological Survey of Great Britain (Scotland) (60). (The Stationery Office for the British Geological Survey.) 171pp. 
Lowden, B, Braley, S, Hurst, A and Lewis, J, 1992. Sedimentological studies of the Cretaceous Lochaline Sandstone, NW Scotland. 159-162 in Parnell, J (editor), Basins on the Atlantic Seaboard: Petroleum Geology, Sedimentology and Basin Evolution. Geological Society of London Special Publication, No.62. 
Mortimore, R N, Wood, C J and Gallois, R W, 2001. British Upper Cretaceous Stratigraphy. Geological Conservation Review Series. No. 23. (Peterborough: Joint Nature Conservation Committee.) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable